FYI, hot OL idle problem solved

With this crazy midwestern heat, I was having an idle issue upon start up. When car would reach operating temp and I would have to restart the car, I was getting a surging idle in OL until the car went to closed loop. Car was running really rich, ECT temps were around 196. Played with fuel tables.

But then I found Open_loop_fuel_multiplier vs ACT. Turns out my ACT was reading 130 at start up! The EEC puts a 0.78 value to the AF (I'm assuming to curb possible detonation) when ACT temps reach 126. I have a 10" air filter in the engine bay, even have it shielded, couldn't believe that it would get that hot in there.

I changed the 126 value to 1.0 and made a 150 value at 0.78. I'll just be careul to listen for detonation in the heat idling around town.

Just got an AFM 86-93 power pipe so I'm going to install that today, I'm sure that will really lower my ACT temps. It really lowered my temps in the summer when I had the 94-95 version.

Stanger007 said:

Have you messed with the ISC transfer or throttle body scalar yet - I'd imagine you'd need to tell the EEC how much air your engine requres (a good bit more than stock with those mods).

I used EEC Analyzer to compute the #s and it cured my hot idle problem!

Click to expand...

Yep, I've been playing with those for awhile, I also have EEC Analyzer